Basically he's got a lot of money. People will attack him no matter what he does, in an effort to redistribute his wealth. It's game theory, there are no billionaires who are liked.
I may be wrong, here are my impressions from 5 minutes spent googling - he already made his fortune in past decades. He is not really in the limelight, not building revolutionary stuff or going up against govt/corporate interests. He is pretty old and has already planned to donate major portions of his wealth already. Elon has signed the giving pledge too btw.
